Selection intensitiesappropriate to pig breeding operations were examined in relation to variations in structure and size of herd, level of testing, and generation interval. Values ofifor boars were larger than
The best models achieved prediction abilities between 0.40 and 0.56, thereby enabling application of a low-intensity selection in F 2. As a result, half of the progenies could be discarded without missing a great part of the good ones. Our results show that through genomic prediction, it is ...
The meanHEfor all the studied breeds was high, which might be due to their breeding history. SimilarHEestimates were reported for composite and Texel breeds raised in New Zealand with an average of 0.346 (Brito et al.2017b) as well as in a variety of sheep breeds worldwide, which ranged...
of the individuals assayed being used for breeding. However, even these reduced selection intensities may be regarded as high, and it seemed worth while to make a test of the efficacy of disruptive selection at a much lower selection intensity. The results of such a test are reported here. ...
(that is, BMR) when selection is based on X (that is, MMR), t is Heredity Response to selection for increased MMR BWM Wone et al 425 generations of selection, i is the selection intensity in X, hx and hy are the heritabilities, rA is the genetic correlation between X and Y and σ...
Recurrent genomic selection may result in high genetic gain, provided that: (a) phenotyping is accurate; (b) selection intensity is explored by genotyping several progenies and increasing the number of candidates; (c) genomic selection is used for early selection; and (d) the model is adjusted...
The objective of any valid breeding program is to increase the suitability of a breed for its future purposes. The approach most often followed in animal breeding for optimizing breeding goals assumes that the sole desire of the owners is profit maximiza
It is tempting to place the blame for the ongoing loss of genetic diversity in US Holsteins (e.g., Maltecca et al., 2020) on breeders who avidly pursue high-index animals, but increases in rates of inbreeding are more likely driven by gains in selection intensity as a result of genomic...
Thus, in terms of effective population size, the F6 was based on a selection intensity of some 25 per cent, of the F5 populations. It will be noted that some definite selection for yield had been made during the development of these PRS base populations. (c) The RS populations Six to ...
Genomic selection (GS) as a promising molecular breeding strategy has been widely implemented and evaluated for plant breeding, because it has remarkable superiority in enhancing genetic gain, reducing breeding time and expenditure, and accelerating the breeding process. In this study the factors affecti...